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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9696290 B1

PDFFull Text
Date of Patent:
Jul. 04, 2017

Filed:

May. 27, 2013

Method for fractionating dioxins

Applicant:

Miura Co., Ltd., Matsuyama-shi, Ehime, JP;

Inventors:

Hiroyuki Fujita, Matsuyama, JP;

Hirofumi Nakamura, Matsuyama, JP;

Assignee:

MIURA CO., LTD., Matsuyama-shi, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Krishnan S Menon

Assistant Examiner:

Dwan A Gerido

Int. Cl.
CPC ...
G01N 33/03 (2006.01); B01D 15/08 (2006.01); B01J 20/08 (2006.01); B01J 20/20 (2006.01); B01D 15/18 (2006.01); B01J 20/32 (2006.01); B01J 20/10 (2006.01); B01J 20/28 (2006.01); B01D 15/12 (2006.01); B01D 15/20 (2006.01);
U.S. Cl.
CPC ...
G01N 33/03 (2013.01); B01D 15/08 (2013.01); B01D 15/12 (2013.01); B01D 15/1871 (2013.01); B01D 15/206 (2013.01); B01J 20/08 (2013.01); B01J 20/103 (2013.01); B01J 20/20 (2013.01); B01J 20/28052 (2013.01); B01J 20/3236 (2013.01); B01J 2220/42 (2013.01); B01J 2220/54 (2013.01);
Abstract

The interior of a fractionating tool for fractionating dioxins is packed with a purification layer and an adsorption layer. The adsorption layer includes a first adsorption layer including an activated carbon-containing silica gel layer and a graphite-containing silica gel layer, and a second adsorption layer including an alumina layer. When a solution of dioxins is injected into the purification layer and is supplied with an aliphatic hydrocarbon solvent, the solvent dissolves dioxins in the solution of dioxins and passes through the purification layer and the adsorption layer. In this process, non-ortho PCBs, PCDDs and PCDFs among dioxins are adsorbed to the first adsorption layer, and mono-ortho PCBs among dioxins are adsorbed to the second adsorption layer. As a result, dioxins are fractionated into a group including non-ortho PCBs, PCDDs and PCDFs, and mono-ortho PCBs.

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